//
//  ViewController+Add.h
//  iOSDemo
//
//  Created by Steve on 2021/3/9.
//

#import "ViewController.h"

NS_ASSUME_NONNULL_BEGIN

@interface ViewController ()
@property (nonatomic, strong) NSString *boss;
- (void)bossAngry; // 扩展方法

@end



NS_ASSUME_NONNULL_END
